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Title : 大连理工大学（土木水力学院） 建筑材料研究所 所长 大连理工大学建筑能源技术研究中心 主任 辽宁省复合材料学会常务副理事长兼秘书长 政协辽宁省委员会委员 “建筑技术与应用”“混凝土”和“国外连建材科技“等杂志编委
Title of Paper:Synthesis of novel chitaline-silica aerogels with spontaneous Au and Ag nanoparticles formation in aerogels matrix
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Date of Publication:2013-05-01
Journal:MICROPOROUS AND MESOPOROUS MATERIALS
Included Journals:SCIE、EI
Volume:171
Page Number:147-155
ISSN No.:1387-1811
Key Words:Aerogel composites; Mesoporous materials; Sol-gel growth; Nanoparticles; Microstructure
Abstract:A composite of a silica aerogel and a copolymer of chitosan and polyaniline (chitaline) with Au or Ag nanoparticles was prepared by a surfactant-free sol-gel process. By grafting polyaniline on the chitosan backbones, the copolymer chitaline was synthesized, which is soluble in aqueous solution. It can be combined with silica gels to form aerogel composites, the specific surface areas of chitaline/silica aerogels are over 650 m(2)/g, with densities low to 0.09 g/cm(3). Upon protonic doping, the chitaline/silica aerogels conductivity rises from less than 10(-8) to 10(-4) S/cm. This kind of chitaline possesses primary amines in the backbone structure that can bind metal ions, and the reduction potential of chitaline was tested lower to 0.735 V, which can easily reduce high potential ions such as Au(III) and Ag(I) to form nanostructured metal particles. And the reduced nanoparticles were observed homogenously dispersed in the aerogels. (C) 2013 Elsevier Inc. All rights reserved,
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